A light source and method for leak detection in which a dichroic filter is used with a powerful lamp emitting UV radiation. The dichroic filter is coated with layers of either tantalum pentoxide or hafnium dioxide to transmit UV in the approximate range of 340-380 nm and infrared above about 700 nm, while reflecting all visible light and shorter wavelength UV radiation.
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January 26, 2000
March 26, 2002
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